Decoder definition clarifies device reversing encoding to retrieve original information and produce outputs for external displays.

A decoder is an electronic device that reverses encoding to retrieve original information and produce unencoded outputs able to drive external equipment; the decoding may follow an agreed standard or be user defined. In digital electronics a decoder is a multiple input, multiple output logic circuit that converts coded inputs into different coded outputs, exemplified by n to 2n and BCD decoders.

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